dfrobot-environmental-sensor 2.0.0

Python 3.8+ library for the DFRobot SEN0500/SEN0501 environmental sensor on Raspberry Pi.

🌍 DFRobot Environmental Sensor Library

Python library for the multifunctional DFRobot Environmental Sensor (SEN0500/SEN0501).
This sensor integrates temperature 🌡️, humidity 💧, UV index ☀️, light intensity 💡, atmospheric pressure 🌪️, and altitude 🏔️ into one module.

It supports both Gravity and Breakout interfaces and communicates over I²C or UART.

👉 This is a Python 3.8+ only fork of the original DFRobot Arduino library, adapted for Raspberry Pi.

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📦 Installation

Simply install with pip

pip install git+https://github.com/kallegrens/dfrobot_environmental_sensor.git@master

⚡️ Package will soon be available on PyPi!

🚀 Pythonic API usage

The library also exposes a modern, Pythonic API for direct use. At the top level you’ll find:

EnvironmentalSensor → the main driver class

Units → supported measurement units (temperature & pressure)

UVSensor → supported UV sensor variants

🐍 Minimal example

from dfrobot_environmental_sensor import EnvironmentalSensor, Units, UVSensor

UV_VARIANT = UVSensor.LTR390UV  # or UVSensor.S12DS
# Create an I²C instance on bus 1
sensor = EnvironmentalSensor.i2c(bus=1, address=0x22, uv_sensor=UV_VARIANT)

if sensor.is_present():
    print("🌡️ Temperature:", sensor.read_temperature(Units.C), "°C")
    print("🌡️ Temperature:", sensor.read_temperature(Units.F), "°F")
    print("💧 Humidity:", sensor.read_humidity(), "%")
    print("☀️ UV Irradiance:", sensor.read_uv_irradiance(), "mW/cm²")
    print("💡 Light:", sensor.read_illuminance(), "lx")
    print("🌪️ Pressure:", sensor.read_pressure(Units.HPA), "hPa")
    print("🏔️ Altitude:", sensor.estimate_altitude(), "m")
else:
    print("❌ Sensor not detected.")

🛠️ Methods

def is_present(self) -> bool:
    """Check if the sensor responds. Returns True if detected."""

def read_temperature(self, units: Units = Units.C) -> float:
    """Return ambient temperature in °C or °F."""

def read_humidity(self) -> float:
    """Return relative humidity (%)"""

def read_uv_irradiance(self) -> float:
    """Return UV irradiance (mW/cm²)."""

def read_illuminance(self) -> float:
    """Return ambient light level (lux)."""

def read_pressure(self, units: Units = Units.HPA) -> float:
    """Return atmospheric pressure in hPa or kPa."""

def estimate_altitude(self, sea_level_hpa: float = 1013.25) -> float:
    """Estimate altitude (m) from current pressure."""

✅ Compatibility

• Raspberry Pi (tested on Raspberry Pi 5)
• Python 3.8+ only

🔗 Product Links

🌐 SEN0500 – Fermion	🌐 SEN0501 – Gravity

📖 Changelog

The full changelog is available in CHANGELOG.md.

Latest Release

• [2.0.0 – 2025-08-20] 💥 Python-only fork
  • ✅ Python 3.8+ support with smbus3
  • ✅ Modernized README and examples
  • ❌ Dropped Arduino and Python 2.x support

Previous Release (DFRobot upstream)

• [1.1.0 – 2024-12-18] ⚡️ Code updates from DFRobot
• [1.0.0 – 2021-12-20] ✨ Initial release by DFRobot (Arduino-compatible)

🙌 Credits

• Originally written by tangjie133 (DFRobot), 2021
• Python 3.8+ fork maintained by kallegrens, 2025